package demo01;
import java.util.concurrent.CountDownLatch;

public class YootkDemo2 {
    public static void main(String[] args) throws Exception {
        CountDownLatch latch = new CountDownLatch(2);
        for (int x = 0; x < 2; x++){
            new Thread(() -> {
                System.out.println("[" + Thread.currentThread().getName() + "] 达到并已上车");
                latch.countDown();
            },"客人 - "+ x).start();
        }
        latch.await();
        System.out.println("[主线程]人齐了，开车走人");
    }
}
